body {
	margin: 0;
	padding: 0;
	font-size: 30
}
div {
	text-align: center;
	font-weight: 30px
}
.mymain, .myfoot {
	width: 960px;
	margin: 0 auto
}
.myhead {
	width: 100%;
	height: 100px;
	background: #ccc
}
.mymain {
	width: 600px;
	height: 500px;
	background: #fcc
}
.myfoot {
	width: 600px;
	height: 100px;
	background: #9cf
}